Two-stage Weak Magnetic Stirling-type Pulse Tube Cryocooler Working at Temperature Around 20 K

被引：0

作者：

Chen, Liu-Biao ^{[1
,2
]}

Wu, Xian-Lin ^{[1
,2
]}

Liu, Xu-Ming ^{[1
,2
]}

Zhu, Wen-Xiu ^{[1
]}

Zhou, Yuan ^{[1
,2
]}

Wang, Jun-Jie ^{[1
,2
]}

机构：

[1] Chinese Academy of Sciences Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Beijing,100190, China

[2] University of Chinese Academy of Sciences, Beijing,100049, China

来源：

Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | 2019年 / 40卷 / 08期

关键词：

Helium - Cooling - Mesh generation - Liquefied gases - Regenerators - Cryogenic equipment - Activated carbon - Magnetism - Stainless steel;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

By using the weak magnetic stainless steel mesh as regenerator material, the second-stage achieved a temperature of 9.6 K with 110 input power when the first-stage was precooled by liquid nitrogen, which is a new record for stainless steel mesh type pulse tube cryocooler. To achieve a lower temperature and retain the weak magnetic properties, the use of activated carbons (AC) with adsorbed helium as a part of the regenerator material to enhance the heat capacity of the matrix has been studied. The adsorbed helium amount by AC was tested, and it shows the specific heat capacities of the AC with adsorbed helium is close to or even exceeded than the commonly used rare-earth materials. The heat penetration depth of AC is large enough because of its smaller specific heat capacity. The heat penetration depth of adsorbed helium is much larger than the size of AC microspores. © 2019, Science Press. All right reserved.

引用

页码：1707 / 1710